and now joining us is ami pedahzur. he is the author of this book, the israeli secret services and the struggle against terrorism. professor, first off, what are the israeli secret services? >> well, the israeli secret services is a very illusive body of various organizations including the branches of the military, the internal security service, the equivalent of the fbi in the united states. the mossad which is the equivalent to the cia and within the army, we have the intelligence branch, which is doing pretty much whatever nsa is doing here in the u.s. >> how -- what is their working philosophy when it comes to counterterrorism? >> well, that's a very interesting question because it's a working philosophy of trial and error. and terrorism -- unlike other types of warfare is very, you know, surprising. and it's not the kind of threat that militaries are using to deal with. what happened in israel over the years is that terrorism took an increasing role in a public domain and became not a strategic threat to the israel